Piston holding attachment for vise jaws



Dec. 18, 1951 O T. D. LLOYD PISTON HOLDING ATTACHMENT FOR VISE JAWSFiled Dec. 19, 1950 INVENTOR.

Patented Dec. 18, 1951 mural) STATES {OFFICE VISE JAWS j 7 Thomas D.Lloyd, Sun Valley, Application December 19, 1950, Serial o. 01,652

room for improving upon such devices, one defect in them being a lack ofcapacity for supporting the piston at a sufficiently high level inrelation to the jaws of the vise to enable the workman 1 Claim; (01.-s1'-39) to mount-said piston in an upstanding position 1 I withoutinterference of the connecting rod with the vise slide. Also the grippedwork has hitherto not been supported in so clearly visible andtool-accessible a manner as i desirable.

Furthermore, hitherto the piston rings have part 9. Said horizontalpart8 is provided with a had. to be removed before placing the piston inits vise-supported position, thus causing an unnecessary waste of time.

Accordingly, objects of the present invention are to overcome theaforementioned defects by providin a device which, when attached 'to thejaws of a conventional vise, will grip an engine piston and rod assemblywith the rings still on the piston, so that the rings and pin may bereplaced and the grooves cleaned and/or widened or deepened withoutremoving that assembly from the vise; to provide a device to render thesupported piston more completely visible to the workman and more readilyoperable upon by his tools, so that he may make the necessary repairsand do the required cleaning with the expenditure of less time andeffort; and to provide, in association with other improved features, anengine piston gripping attachment for a vise that will have a pair ofgripping jaws contoured in such a manner as firmly to hold in mountedposition engine pistons varying greatly in size.

The construction is such that the mounted piston has adequate support,and is held securely at all times, thus insuring that it will not bedistorted. Furthermore, a vise equipped with this attachment will holdthe piston equally well either in normal or inverted position, making itpossible to reassemble piston, pin and rod and/or bushings whenevernecessary.

Other objects, advantages and features of invention will hereinafterappear.

Referring to the accompanying drawing, which illustrates a preferred,reduced to practice embodiment of the invention;

Fig. 1 is a fragmentary, perspective view illustrating the device asapplied to' a conventional vise and in use to support a piston and itsconnecting rod in a normal, upright position to be worked upon. The viseis shown in phantom lines. The scale of this view is somewhat smallerthan that of the remaining viewst Fig. 2 is an elevational view of oneof the twin holding shoes provided by the invention for attachment tothe jaws of the vise, the observer looking at the work holding face ofsaid shoe.

Fig; 3 is a top plan view of the shoe shown in Fig. 2, the viewpoint ofthe observer being in dicated by line 3-3 of Fig. 2.

Fig. 4 is an endelevation looking at the right endof the shoe shown'inFig.2.

Fig. 5, is a cross'sectio'non line 5-5 of Fig. 2.

Referring in detail to the drawing, the device comprises a pair of twinshoes Band 1 each of which has a body portion consisting of ahorizontally disposed part 8 and a vertically disposed fiat undersurface seatable upon the upper surface of either of the conventionalvise jaws, a stationary vise jaw l0 and cooperating movable vise jaw Hbeing shown in Fig. 1, together with the vise slide or guide bar I2.vThe upp rpqre tions of these two jaws are dimensioned and contouredalike, hence the twin shoes 6 and I are interchangeable in relation tothem.

It will be seen that the body portion 8 of each shoe provides a shelfthat extends all the way across the underlying vise jaw, said shelfhaving an internal jaw engaging surface l3 and carrying at each end adownwardly directed flange l4 having through it a screwthreaded hole I5to receive a set screw I6, four set screws being used to secure theshoes to the jaws of the vise.

In each shoe the horizontal body portion 8 intersects the vertical bodyportion 9 at a right angle thus forming adjacent faces which overlie andabut the top and front faces of the vise jaw. Said vertically disposedbody portion has on its exposed face twin forward projections I 8 whichare triangularly shaped as viewed in plan, said projections combining toproduce between their apices a broadly V-shaped recess l9 with a roundedvertex 20.

Said horizontally disposed body portion 8 has its exposed face slopedupwardly and forwardly and merged in front with the aforesaid triangularprojections 18, thus lengthening upwardly the piston gripping face ofthe shoe. Said forwardly sloping face of the shoe is provided with anarcuate midlength recess 2| with two twin, up-

wardly projecting parts 22. This recess affords space in which toposition a tool for removing a wrist pin of a piston 25 gripped betweenthe shoes 6 and 1.

Without the additional support provided by the upper projections 22carried by the shoes, affording gripping surfaces above the tops of thevise jaws, there would be an insufiicient grippingsurface provided bythe device to grip the skirt portion of the piston and at the same timehold the piston in a position for driving the wrist pin therethrough asshown in Fig. 1.

Said upper projections can be modified considerably as to size and shapewithout impairing their function, but should be of the proper Size, and

shape to cooperate in clamping in the mounted position engine pistonsranging from'the smallest to the largest size now being manufactured,

and provided also that in the mounted position of the piston the latterwill be elevated sufficiently so that the connecting rod will notinterfere with the vise slide;

Each upwardly projecting part or rise 22 is shown having :a restrictedfiat, horizontal top surface 220. and aback surface area 221) whichinclines downwardly to the outer side of the shoe; while the end surface220 of the rise 22 is shown spaced inwardly from the adjacent end of theshoe leaving room for a horizontal ledge 8a which is substantially onthe same level as the lowestpart of the aforesaid depression or recess21.

In Fig; 1 the gripping faces of the shoes and 1 are assumed to be linedwith a compressible can be rocked about its two attaching screws It to asuflicient extent to cause the mounted piston to aline perfectly withthe parts between which it is clamped.

I claim:

Mounting means for pistons comprising twin members adapted to bemountedv on the jaws of a conventional vise, each member consisting inpart of a shoe having horizontally and vertically disposed body portionswhich intersect at a right angle and form adjacent faces whichrespectively overlie and abut the top and front faces of the vise jaw,each vertically disposed body portion having on its exposed face twinforward projections which are triangularly shaped as viewed in'plan,said projections combining to produce between their apices a broadlyV-shaped recess and each horizontally disposed body portion having itsexposed face sloping upwardly and forwardly and merging in front withsaid forward projections to lengthen upwardly the piston grippingsurface of the shoe, said forwardly sloping upper face having in its topsurface at the midlength of the shoe a depression affording space inwhich to position a tool for removing a wrist pin of a piston gripped bysaid mounting means.

THOMAS D. LLOYD.

material, for example rubber or canvas, to guard REFERENCES CITED Thefollowing references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 791,3'7 1 Shepardson May 30, 19051,273,319 Blakely July 23, 1918 1,393,083 Campbell Oct. 11, 19211,672,808 Hansel June 5, 1928 2,100,534 Zimmerman Nov. 30, 1937 VFOREIGN PATENTS Number Country Date 18,526 Great Britain -1 Oct. 27,1891

